Portable drilling-machine



- 4 Sheet-Sheet 1. O. L. SMITH 80 C. H. WESTERMAN.

PORTABLE DRILLING MACHINE. No. 430,700. Patented June 24, 1890 (No Model.)

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(No Model.) 7 4 Sheets-Sheet 2. O. L. SMITH & O. H. WESTERMAN.

PORTABLE DRILLING MACHINE.

Patented June 24; 1890.

(No Model.)

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0; L. SMITH & G. H. WESTER PORTABLE DRILLING MACHINE.

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PORTABLE DRILLING MACHINE.

PatentedJune 24, 1890.

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UNITED STATES PAT NT OFFIC CHARLES L. snrrn AND CHARLES H. WESTERMAN, oE JAMEsTown, NEW YORK.

PORTABLE DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 430,700, dated June 2d, 189i).

Application filed August 23, 1889. Serial No. 321,735. (No model.)

T0 on whom it may concern.-

Be it known that we, CHARLES L. SMITH and CHARLES H. WESTERMAN, citizens of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented a new and useful Portable Drilling-Machine, of which the following is a specification.

This invention relates to portable drillingmachines for drilling oil and other wells; and it has for its object to constructa machine of this kind which shall be simple in cdnstruction and which shall possess superior advantages in point of durability and general efficiency.

The primary object of the invention is to provide an improved mechanism for counterbalancing the weight of the tool, thus causing the machine to run smoothly and easily.

A further object of the invention is to impart the necessary vertical reciprocating motion to the tool by carrying the drill-rope over a sheave mounted eccentrically upon a rotary disk or flange.

A further object of the invention is to provide an improved brake mechanism for regulating the paying out of the drill-rope, for stopping the revolution of the bull-wheel shaft when desired, and mechanism for rewinding the drill-rope.

With these ends in View, our invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a perspective view of a portable drillingmachine embodying our improvements. Fig. 2 is a longitudinal vertical section of the same. Figs. 3 and 3 are perspective detail views of the counter-balance and of the disk or flange carrying the sheave for operating the drilll'ope. Fig. 4 is a top plan view of that part of the machine which embodies our invention.

Fig. 5 is a longitudinal sectional view taken on the line 00 0c in Fig. 4. Fig. 6 is a side elevation of that part of the machine shown in Figs. land 5. Fig. 7 is a perspective detail View of the spring-tension device for operat ing the brake mechanism. Fi 8 is a sectional detail View of the latter.

shaft are normally supported slightly above the frame and are enabled to swing forwardly or rearwardly a short distance, as may be required.

9 designates a shaft mounted transversely in suitable bearings near the rear end of the frame. Said shaft carries the balance-wheel 10, motion to which is transmitted from the engine by a belt or band 11, running from a pulley upon the main shaft of the engine under a suitably-located idler 12. The balance-wheel 10 is provided near its periphery with a laterally-extendin g stud 15, upon which is pivoted the counter-balance 14, which consists of a metallic disk having a slot 15 concentric with the pivoting-stud 15. The balance-wheel 10 has a set-screw 16 extending through the slot 15 of the counter-balance and serving to clamp the latter in any position to which it may be adjusted. A washer 17 may be interposed between the counterbalance and the balance-wheel. It will be seen that the counter-balance by merely loosening the set-screw 16 may be quickly and accurately adjusted to one side of the shaft 9, which forms the center of the balance-wheel. The shaft 9 carries at one end a band-wheel 18, connected by a belt 19 with the bull-wheel 6 upon the shaft 4; at its other end the disk or flange 20, upon the outer face of which is ecc'entrically j ournaled a sheave 21.

22 designates an upright suitably mounted upon the frame and carrying at its upper end a pulley 23. The drill-rope 24, which is in practice wound or coiled upon the bullwheel shaft, as will be seen in Fig. 2 of the drawings, passes from thence over the pulley 23, thence under-the sheave 21, then over the crown-wheel 25, which is simply a pulley journaled at the upper end of the supporting-posts 26, and then in a downward direction to the stem of the tool or auger 27, to which it is attached in the usual manner.

28 designates a shaft, which is mounted in boxes 29 at the rear end of the frame 1. One end of the shaft 28 is provided with a lever 30, having a spring-actuated catch 31 adapted to engage any one of a series of notches 32 in a segmental bracket 33, which is suitably attached to the frame and by means of which the said shaft 28 may be retained securelyin any position to which it may be adjusted. The shaft 28 is provided near its ends with radial extending arms 34 34, which are pivotally connected with the rear ends of the tension-rods 35. Each of the latter is composed of two tubular sections 36 and 37, of gas-pipe or other suitable tubular metal rods. The rear section 36 is provided at its front end with a forwardlyextending stem 38, firmly secured therein and extending into the front section 37, in which it has a longitudinally-sliding movement.

A spring 39, coiled upon the stem 38, serves to force the sections 36 and 37 normally apart from each other, the ends of the said spring being firmly attached to both of said sections. A sleeve 40 incloses and protects the spring 39 without interfering with the action of said spring or with a sliding movement of the sections 36 and 37 relatively to each other. The front ends of the compound tension-rods 35 are firmly attached to the boxes 7 in which the bull-wheel is mounted, as hereinbefore described, andv which by this mechanism may be adjusted longitudinally with relation to the frame.

Suitably bolted to the sides of the frame in rear of and closely adjacent to the bullwheels are the brake-blocks 41, which, by moving the boxes or bearings of the bullwheel shaft in a rearward direction, may be brought in contact with the said brake-blocks for the purpose of retarding the movement of the bull-wheel shaft.

In operation motion is transmitted by the belt 11 from the engine to the balance-Wheel mounted upon theshaft 9. Rotary motion is thereby imparted to the disk 20, carrying the eccentrically -mounted pulley 21, over which the drill-rope passes, as described, and thus alternately straining the drill-rope so as to raise the tool and slackening it so as to drop the latter. In this manner an exceedingly quick and short movement is imparted to the tool, which we have in practice found exceedingly efficient, far more so than where the mere dead-weight of the tool is relied upon to deliver the blow. By properly adj usting the counter-balance upon the side of the shaft 9, opposite to that at which the sheave 21 is journaled, it will be observed that the weight of the tool and that portion of the drill-rope which is in the well may be compensated for, thereby causing the machine to operate smoothly and evenly and with less power than would otherwise be required for the purpose of raising the drillrope.

Normally when the machine is in operation the operating-lever 30 of the shaft is thrown down, holding the tension-rods 35 and the boxes 7, carrying the bull-wheel shaft 4, at the rear limit of their movement, and thus holding the bull-wheels in contact with the brake-blocks ll, whereby the said bullwheels are prevented from rotating except at each drop of the tool, when the rope will unwind sufficiently to be automatically paid out. It will be observed that when the bullwheels are in this position the belt 19 is slackened, thus permitting the shaft 9 to revolve without much frictional contact of the pulley 18 with the said belt. When it shall be desired to rewind the rope upon the bull-wheel shaft the lever 30 is operated so as to throw the bull-wheel shaft forward sufficiently to relieve the bull-wheels from the brakes, but not enough to tighten the belt 19. This operation gives slack rope, for the reason that there is not enough tension upon the rope to enable the tool to be lifted. The engine is now stopped and the drill-rope 24 is slipped from under the sheave 21. The lever 30 is next operated so as to move the boxes carrying the bull-wheel shaft in a forward direction sufficiently to tighten the belt 19, when the bull-wheel shaft will immediately receive rotary motion from the shaft 9, and the drillrope will be wound, as will be seen in dotted lines in Fig. 2 of the drawings.

Te claim and desire to secure by Letters Patent 1. In a drilling-machine, the combination, with suitable operating mechanism, of a wheel having a counter balance to balance the weight of the tool to be operated and the drillrope, and a disk mounted upon the shaft of the said wheel, and having an eccentrically journaled sheave, by contact with which the drill-rope is alternately strained and slackened, substantially as set forth.

2. In adrilling-machine,theherein-described balance -wheel having a counter-balance mounted pivotally near the rim of the same, and provided with a slot through which the shaft of said balance-wheel works, and the set-screw to secure the said counter-balance in any position to which it may be adjusted, substantially as set forth.

3. In a drilling-machine, the combination, with suitable operating mechanism, of a balance-wheel having an adjustable counter-balance, and a disk mounted upon the shaft of the balance-wheel, and having an eccentrically' mounted sheave, substantially as and for the purpose set forth.

4. In a drilling-machine, the combination of the bull-wheel shaft, brake mechanism for retarding the rotary movement of the same, a rotary disk having an eccentrically-mounted sheave, the balance-wheel mounted upon the shaft of the'said rotary disk and having the adjustable counter-balance, and the drill-rope coiled upon the bull-wheel shaft and passing over the ecoentrically-mounted sheave, substantially as and for the purpose set forth.

5. The combination of the bull-Wheel shaft,

brake mechanism for retarding the rotary movement of the same, a transverse shaft havin ga balance-wheel provided with an adj ustable counter-balanc'e, and a disk having an eccentrically-mounted sheave, an upright arranged between the bull-wheel shaft and the shaft carrying the disk, having the said eccentrie sheave, and provided with a guide-pulley at its upper end, and the drill-rope coiled upon the bull-wheel shaft and passing over the said CHARLES L. SMITH. CHARLES H. VVESTERMAN.

Witnesses:

JOHN WooDwARn, ARTHUR O. WADE. 

